An NSP file is the standard format used for digital game installations, DLC, and updates on the Nintendo Switch system. When developer Intelligent Systems releases a patch to fix glitches or tweak gameplay mechanics, that patch is bundled into an NSP update file.
While v1.0.0 is fully playable, v1.0.1 smooths out minor performance dips during confetti collection and fixes a rare crash in the Shogun Studios area. Highly recommended for a seamless playthrough.
: Once installed, the version number v1.0.1 will be displayed on the game's title screen.
Ensure you are using the latest version of your title installer. If you trust the file source, you can temporarily toggle "Install Unsigned Code" in your installer settings.